Replace remaining hardcoded hex colors with color tokens (CR-27)

Map leftover component hex values onto the existing color scale, and leave third-party share brands and the Avatar white-alpha border documented as intentional exceptions.

app/(app)/create/screens/review/FinalReviewScreen.tsx

@@ -270,7 +270,7 @@ export function FinalReviewScreen({
         }
         size={mdUp ? "L" : "M"}
         expanded={true}
-        backgroundColor="bg-[#c9fef9]"
+        backgroundColor="bg-[var(--color-surface-invert-brand-teal)]"
         logoUrl={getAssetPath(vectorMarkPath("mutual-aid"))}
         logoAlt={ruleCardTitle}
         categories={finalReviewCategories}